View Full Version : Anyone else ever get shocked by their N900?
slaapliedje
2010-06-28, 13:36
I don't mean it's awesome capabilities, but actually physically shocked?
Yesterday I had booted into Windows 7 64-bit, usually I use Linux, but occasionally play games in Windows, and decided yesterday to install the new version of the Ovi Suite.
I was also doing some virus scans, because my comptuer has been doing odd things lately.
Anyhow I left my N900 plugged in all night so it could charge. This morning I went to pick it up and it shocked me twice. It was a very low voltage shock, but was... well shocking :D
I unplugged the usb cable from the computer, and it no longer shocked me at that point.
I will say that I wasn't using the Nokia cable, I've been using the same cable that came with my Logitech mouse, which has worked perfectly for months. I also had plugged it back in to test it again and didn't have the problem.
Just wondering if anyone else has ever had this.
slaapliedje
Looks like your computer has not properly earthed.....
Reffyyyy
2010-06-28, 13:38
This happens to me every time I charge from my laptop.
Using standard Nokia cable.
I got a phsyical shock when i found mms wasnt supported.
The heavens opened and a bolt got me good and proper it did !
earthing problem.. the wire has some resistance and the body of the electrical equipment has > zero potential thus causing shock!
slaapliedje
2010-06-28, 14:04
I think more than likely what happened is the cable had gotten under my A/C. Which... de-earthed it? :D That's the only difference I could see.
slaapliedje
this happens to me too. Normally after a visit to youporn.com whilst wearing a wolly jumpa ;)
this happens to me too. Normally after a visit to youporn.com whilst wearing a wolly jumpa ;)
I think you'll find that's a polyester jumper :D
To the OP - get off the carpet (static build up) or try touching the computer first.
lol, if his computer was not properly earthed then touching the computer case would give him a major shock.
Once I saw two tiny lightning appeared between my fingers and the computer case, then I realized the case was not properly earthed. The shock left two charred holes on my fingers.
The case was not having statics, it's LIVE. XD
slaapliedje
2010-06-28, 14:59
I did touch the computer first, it was just a very odd thing to happen, at least I know the spots of where not to touch to not get shocked :D
slaapliedje
The way a computer is built it is very unlikely to have a earthing problem! That said lap tops only have a positive and negative low voltage 12volts I believe, not enough to shock you.
If it is a PC then check the mains cable for a damage earth or check the building's wiring.
Every time I get out of the car I get a shock when I close the door especially now it's summer.
James_Littler
2010-06-28, 16:08
12volts I believe, not enough to shock you.
Really?...Go stick your tongue across the terminals on a 9v battery (square smoke alarm ones).
Every time I get out of the car I get a shock when I close the door especially now it's summer.
Usually static as the shell of the car acts as negative circuit, where as the wiring will provide 12v (live power) 12v (ignition) or a variable voltage (signal), all 'earth wires' go back to the chassis, so you will not get an electric shock from a car unless you have a +ve in one hand and a -ve in the other, you may however earth the car and allow the static to discharge.
Every time I get out of the car I get a shock when I close the door especially now it's summer.
That was just statics. It can be prevented, ask a mechanic.
Edit: Oops, upstair IS the mechanic you can listen to. ^^ Right, get a static discharge strip for your model. There's some other devices that can store statics, it's more reliable than strips but need to be replaced periodically. Nevertheless, you don't need to live with the static shock, especially when statics would cause harm to your car in the long run.
It's actually pretty standard for me to get shocked by the N900 :P
I'm using a laptop (Asus F5SL series) and usually I'm just using boxers at home (it's around 30º Celsius here all day long) and when I have the N900 connected to the laptop charging or using has mass storage and touch that metal part around the screen I get slight shocks...
festivalnut
2010-06-28, 17:12
never got a shock from my n900 but i once shocked my n95 and thought i'd killed it, where i work i get pretty bad static shocks on a daily basis (not intentionally, it jus happens!) went out for a smoke break one lunchtime and didn't realise i hadn't had a shock in a while, talkin on the phone i leaned onto a meatal railing and the shock ran through my hands and through my ear at the same time, fried the phone for a few seconds then it reset, but with what i assume was a blown speaker, never sounded the same again. moral of the story? smoking kills n95's! :O
I don't remeber the OP saying he got the shock licking his phone.
Really?...Go stick your tongue across the terminals on a 9v battery (square smoke alarm ones).
Your splitting hairs. Put your fingers across it - did you get a shock? Now put your finger in the 14v cigarette lighter socket in your car - did you get a shock? No on both accounts as there is insufficiant potential to shock you.
Usually static as the shell of the car acts as negative circuit, where as the wiring will provide 12v (live power) 12v (ignition) or a variable voltage (signal), all 'earth wires' go back to the chassis, so you will not get an electric shock from a car unless you have a +ve in one hand and a -ve in the other, you may however earth the car and allow the static to discharge.
Again 14v car electrics lack sufficiant potential to shock you. 14v cannot pass through the paint work. If it could your car would disolve dramatically each time it rained.
Static on you car will most likely be cause by dry air passing over the body of the car while driving, doing so will cause a charge to build up on the car because the rubber tires insulates it. It will more liklely be in the 100s of volts as it is static electricily and static is caused by two items rubbing, not battries.
In the UK the electrical regulations state the any voltage under 50v is considered extra-low voltage (http://en.wikipedia.org/wiki/Extra-low_voltage) (hence the use in bathrooms). At the lower end of that scale you can't get a shock because your skin lacks sufficiant moisture to conduct.
I have heard of stories of old electricians with dry hands, too lazy to get a meter, licking their fingers and then flicking live wires to feel if they were live, (not recomended) because their hands were so dry, they could touch 240v and feel nothing.
If people are getting shocks from a phone plugged into battery powered laptops, may be the air from the lap top fan is causing a stitic build up. The only thing I can think of.
dymaxion
2010-06-28, 18:27
Yes I have too been shocked by my N900, but when charging via USB from my laptop, which in turn was charging from mains supply... and found laptop charger wasn't properly earthed...
I get painful shock consistently when touching one particular corner of my laptop... strange feeling indeed!
maverick788us
2010-08-29, 17:27
This is not the first time, when my N900 is connected with my PC USB cable I get SHOCKS while touching it. Thankfully it didn't cause any damage to my handset. Is it something I have to worry??:confused:
Make sure your feet are on carpet or so, but not on the ground.
dont worry, I was hit by the lightning some 3 weeks ago and n900 were in my pocket. I'm still alive so as my n900 :)
pinkfloyd
2010-08-29, 17:43
Lol, just dont touch the ground or wall...that is normal.
optimistprime
2010-08-29, 17:47
no, not normal. Is this happening when you have the N900 pluggled into a regular AC current outlet?
pinkfloyd
2010-08-29, 17:51
no, not normal. Is this happening when you have the N900 pluggled into a regular AC current outlet?
In that case it should not happen...but when its plugged to computer USB it is perfectly normal...(if you touch the ground of course)
sjgadsby
2010-08-29, 17:56
The thread "WTF I feel SHOCK!! sometimes while touching my N900 when its connected to USB" (6 posts) has been merged into this thread.
optimistprime
2010-08-29, 18:02
In that case it should not happen...but when its plugged to computer USB it is perfectly normal...(if you touch the ground of course)
no, that is not normal. That would mean that any usb accessory like a camera or mp3 player should shock you too when you use usb. Thats ridiculous. I have had my n900 plugged into my laptop sitting on the carpet floor of my home and no issues ever. The laptop plug and laptop should be sufficient grounded to avoid that.
Have you got extras-devel enabled? If so, you were warned! (http://wiki.maemo.org/Extras-devel)
Think of the children! Oh, won't somebody please think of the children!
i got shocked when it was plugged in the pc usb and i came out of the bathroom after a shower and my flip flops were wet. Damn dropped the phone on the floor. Now only touch it when wearing dry slippers or shoes. Since i dont have carpet due to cat in the house.
stickymick
2010-08-29, 19:05
Shockin' that's all I can say.
Sounds to me like static build up from walking about on polyester carpets. You'd probably get a shock if you touched the central heating radiators too. But I must also say it's never happened to me and my N900.
I used to get zapped a lot when I went shopping in a certain department store. They had polyester carpets leading up to the escalators. *CRACK* :eek:
ossipena
2010-08-29, 19:15
at least my old pc gave me shocks when my toes touched the radiator (grounded) and my hands touched the housing. it might be the live current leaking to ground (shouldn't happend btw), cover is RST if I remember correctly and it probably is earthed...
HellFlyer
2010-08-29, 19:15
Show me on the N900 where he touched you :D
My understanding is that all computers that are plugged into a ungrounded plug (meaning it doesn't have the third wire), have half the voltage that comes from the wall on the chassis (here it's 230V so about 115V on the chassis), but amperage is almost nonexistant so you can get small shock. This is due to how power supplies work. Of course this causes the same to all devices plugged into the computer.
[edit] Good explanation on the leak current.
http://www.epanorama.net/documents/pc/ungrounded_pc.html
Typically when your computer is connected to ungrounde 230V AC power source you have 115V AC on the case of your computer ! This is caused by the leakage current capacitors inside the mais filter.
This voltage itself is not dangerous, because the current is limited (around 0.5 mA maximum). If you touch your computer you might feel some tickeling in your fingers when you move your hand because of the potential in the case. This can be annoyning and even little painful if you touch something which is connected to ground at the same time (not recommended for your safety).
maverick788us
2010-08-29, 21:19
dont worry, I was hit by the lightning some 3 weeks ago and n900 were in my pocket. I'm still alive so as my n900 :)
That kind of shock would hardly cause any harm to me. I a not concerned about it. All I am concerned about is my N900 does'nt get affected by it
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